Dan Hole River Dam
Dan Hole River Dam is a concrete dam located in Carroll County, New Hampshire, built in 1935. It carries a Significant hazard potential classification and has a poor condition assessment.
About Dan Hole River Dam
The primary purpose of Dan Hole River Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Town Of Ossipee (local government). It impounds the Dan Hole River near Ossipee.
The dam stands 29 feet tall and stretches 140 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 77 acre-feet, and collects water from a drainage area of 11 square miles. Completed in 1935, the structure is well-established, with more than 75 years of service.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 09/26/2022.
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Location
| State | New Hampshire |
| County | Carroll |
| Nearest City | Ossipee |
| River/Stream | Dan Hole River |
| Coordinates | 43.75440, -71.17160 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 140 ft |
| Year Completed | 1935 (91 years old) |
Storage & Hydraulics
| NID Storage | 77 acre-ft |
| Max Storage | 77 acre-ft |
| Normal Storage | 67 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 11 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | TOWN OF OSSIPEE |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 09/26/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NH00569 |
| Federal ID | NH00569 |
| More Info | State Dam Safety Program |